The Nakajima Sakae
("Prosperity") was an air-cooled 14-cylinder
double-row radial engine with a single-speed supercharger and a bore of
130mm and stroke of 150mm. It was derived from the
Gnome-Rhone engine produced under license in the 1930s. It could run
reliably on a very lean fuel mixture on extended flights, which helped
give the A6M "Zero" its
impressive range. Kawasaki
also produced the engine
under license.

Model

Horsepower

Wattage

Notes

11

1000 hp (takeoff)
970 hp (9800 feet)

746 kW (takeoff)
723 kW (3000m)

Also known as
the NK1B or [Ha-35] 11

12

940 hp
(takeoff)
950 hp (13,800 feet)

701 kW
(takeoff)
708 kW (4200m)

Also known as
the NK1C or [Ha-35] 12

21

1130 hp (takeoff)
1100 hp (9350 feet)
980 hp (19,700 feet)

834 kW (takeoff)
820 kW (2850m)
731 kW (6000m)

Also known as
the NK1F or [Ha-35] 21. The Sakae 22 was a mirror image developed
for the J1N "Irving".